Photovoltaic back panel



FIG. 1 is a perspective view of the photovoltaic back panel;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a left elevation thereof;

FIG. 6 is a right elevation thereof; and,

FIG. 7 is a bottom plan view thereof. 

CLAIM The ornamental design for a photovoltaic back panel, as shown and described. 